CVE-2022-33177

Booking Calendar <= 9.2.1 - Cross-Site Request Forgery

2022-09-06 14:36

Strategic Overview

Status: Patched in 9.2.2
Affected Plugin: Booking Calendar
Affected Version: <= 9.2.1
CVSS: 5.4Medium
Weakness type: CWE-352 · Cross-Site Request Forgery (CSRF)
CVE: CVE-2022-33177

View all Booking Calendar vulnerabilities

At a glance

CVE-2022-33177 is a medium-severity Cross-Site Request Forgery (CSRF) vulnerability in the Booking Calendar WordPress plugin, affecting versions <= 9.2.1. It carries a CVSS score of 5.4 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 9.2.2; sites on affected versions should update now. Disclosed September 2022, reported by Muhammad Daffa.

Vulnerability Overview

The Booking Calendar plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 9.2.1. This is due to missing or incorrect nonce validation on the wpbc_translation_buttons_settings_section function. This makes it possible for unauthenticated attackers to update translation settings, via forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site.

CWE-352: Cross-Site Request Forgery (CSRF)

Reaching this weakness in Booking Calendar <= 9.2.1 takes a caller who can reach the endpoint. Cross-site request forgery abuses the fact that browsers attach a victim's cookies to any request, so a state-changing action that only checks who you are, not whether you meant to act, can be triggered from another site.

An attacker who gets a logged-in user to load a crafted page can perform that action as them, with the impact scaling to whatever the victim's role is allowed to do. For Booking Calendar the fix is 9.2.2: builds <= 9.2.1 are affected, anything from 9.2.2 onward is not.

Remediation

Update to version 9.2.2, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Booking Calendar: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Booking Calendar 9.2.2 closes this, and updating the plugin is the step that ends it.

Firewall
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2022-33177 https://www.wordfence.com/threat-intel/vulnerabilities/id/982be9d7-fe9f-40c6-a474-fcc2d6455839 https://nvd.nist.gov/vuln/detail/CVE-2022-33177

Related records

Same weakness class

Other vulnerabilities in Booking Calendar

CVSS Vector

5.4

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityLow

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